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Massive Jupiter is undergoing dramatic atmospheric changes that have never been seen
before with the keen "eye" of NASA's Hubble Space Telescope.

Jupiter's turbulent clouds are always changing as they encounter atmospheric disturbances
while sweeping around the planet at hundreds of miles per hour. But these Hubble images
reveal a rapid transformation in the shape and color of Jupiter's clouds near the equator,
marking an entire face of the globe.

The planet is wrapped in bands of yellows, browns, and whites. These
bands are produced by the atmosphere flowing in different directions at
various latitudes. Lighter-hued areas where the atmosphere rises are
called zones. Darker regions where the atmosphere falls are called
belts. When these opposing flows interact, storms and turbulence appear.

Between March 25 and June 5, Hubble's Wide Field and Planetary Camera 2 captured
entire bands of clouds changing color. Zones have darkened into belts and belts have lightened
and transformed into zones. Cloud features have rapidly altered in shape and size.

The image at left shows a thin band of white clouds above Jupiter's equator. The white color
indicates clouds at higher altitudes in Jupiter's atmosphere. In the image at right, the band's
white hue has turned brown, showing clouds deep within the planet's atmosphere. The
whole band appears to have merged with the one below it.

In the same cloud band above the equator, the small swirls in the left-hand image have
morphed into larger wave-like features in the right-hand photo. Dominating the band is a
dark streak that resembles a snake. This serpent-shaped structure is actually a small tear
in the cloud deck, which gives astronomers a view deep within the atmosphere.

Below the equatorial region, the brownish upside-down shark fin in the left-hand image
disappears in the photo at right. Appearing instead are brownish tongue-shaped clouds with
a stream of white swirls below them.

These global upheavals have been seen before, but not with Hubble's sharp resolution.
Astronomers using ground-based telescopes first spied drastic atmospheric transformation
in the 1980s. Another major disturbance was seen in the early 1990s, after Hubble was
launched into space. The telescope, however, did not have the resolution to view the
upheaval in fine detail. These higher-quality Hubble images may help astronomers
understand how such global upheavals develop on Jupiter.